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From KNILT
- 19:48, 13 May 2016 diff hist +1 Lesson 1.1: Reflection current
- 19:40, 13 May 2016 diff hist +32 Lesson 2.2: Problem Solving current
- 19:39, 13 May 2016 diff hist +74 Lesson 2.2: Problem Solving
- 19:37, 13 May 2016 diff hist -1 Lesson 2.2: Problem Solving
- 19:36, 13 May 2016 diff hist +1 Lesson 3.2: Lesson Planning current
- 19:35, 13 May 2016 diff hist -1 Lesson 3.2: Lesson Planning
- 19:34, 13 May 2016 diff hist +1,150 Lesson 3.2: Lesson Planning
- 19:26, 13 May 2016 diff hist -2 Lesson 3.2: Lesson Planning
- 19:26, 13 May 2016 diff hist +14 Lesson 3.2: Lesson Planning
- 19:25, 13 May 2016 diff hist +3 Lesson 3.2: Lesson Planning
- 19:25, 13 May 2016 diff hist -1 Lesson 3.1: Teaching with the Graphing Calculator current
- 19:24, 13 May 2016 diff hist -12 Lesson 3.1: Teaching with the Graphing Calculator
- 19:24, 13 May 2016 diff hist -1 Lesson 3.1: Teaching with the Graphing Calculator
- 19:23, 13 May 2016 diff hist +1 Lesson 3.1: Teaching with the Graphing Calculator
- 19:23, 13 May 2016 diff hist +449 Lesson 3.1: Teaching with the Graphing Calculator
- 19:19, 13 May 2016 diff hist +69 Lesson 3.1: Teaching with the Graphing Calculator
- 19:16, 13 May 2016 diff hist +451 Lesson 3.1: Teaching with the Graphing Calculator
- 19:13, 13 May 2016 diff hist +69 Lesson 3.2: Lesson Planning
- 19:12, 13 May 2016 diff hist +1 Lesson 3.2: Lesson Planning
- 19:12, 13 May 2016 diff hist 0 Lesson 3.2: Lesson Planning
- 19:11, 13 May 2016 diff hist 0 Lesson 3.2: Lesson Planning
- 19:11, 13 May 2016 diff hist +6 Lesson 3.2: Lesson Planning
- 19:10, 13 May 2016 diff hist +26 Lesson 3.2: Lesson Planning
- 19:09, 13 May 2016 diff hist 0 N File:Girraf.gif current
- 19:09, 13 May 2016 diff hist +132 Lesson 3.2: Lesson Planning
- 19:07, 13 May 2016 diff hist +151 Lesson 3.2: Lesson Planning
- 19:06, 13 May 2016 diff hist +352 Lesson 3.2: Lesson Planning
- 18:57, 13 May 2016 diff hist +511 Lesson 3.2: Lesson Planning
- 18:53, 13 May 2016 diff hist -16 Lesson 2.3: Analyzing the Exam current
- 18:52, 13 May 2016 diff hist +602 Lesson 2.3: Analyzing the Exam
- 18:46, 13 May 2016 diff hist +166 Lesson 2.3: Analyzing the Exam
- 18:44, 13 May 2016 diff hist -4 Lesson 2.3: Analyzing the Exam
- 18:44, 13 May 2016 diff hist -26 Lesson 2.3: Analyzing the Exam
- 18:44, 13 May 2016 diff hist -9 Lesson 2.3: Analyzing the Exam
- 18:43, 13 May 2016 diff hist +10 Lesson 2.3: Analyzing the Exam
- 18:43, 13 May 2016 diff hist +4 Lesson 2.3: Analyzing the Exam
- 18:42, 13 May 2016 diff hist +11 Lesson 2.3: Analyzing the Exam
- 18:39, 13 May 2016 diff hist -2 Lesson 1.1: Reflection
- 18:38, 13 May 2016 diff hist +1 Lesson 1.1: Reflection
- 18:36, 13 May 2016 diff hist +69 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:34, 13 May 2016 diff hist -1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:34, 13 May 2016 diff hist +2 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:34, 13 May 2016 diff hist +4 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:34, 13 May 2016 diff hist -6 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:33, 13 May 2016 diff hist +38 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:33, 13 May 2016 diff hist 0 N File:LTdoonMkc.gif current
- 18:29, 13 May 2016 diff hist -17 Teaching Problem Solving in Algebra using the Graphing Calculator →Prerequisites
- 18:28, 13 May 2016 diff hist -1 Teaching Problem Solving in Algebra using the Graphing Calculator →Objectives
- 18:28, 13 May 2016 diff hist +1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:27, 13 May 2016 diff hist -1 Teaching Problem Solving in Algebra using the Graphing Calculator →Prerequisites
- 18:27, 13 May 2016 diff hist +158 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:21, 13 May 2016 diff hist +26 Teaching Problem Solving in Algebra using the Graphing Calculator
- 18:04, 13 May 2016 diff hist +2 Lesson 2.3: Analyzing the Exam
- 18:03, 13 May 2016 diff hist +23 Lesson 2.3: Analyzing the Exam
- 17:55, 13 May 2016 diff hist +27 Lesson 3.1: Teaching with the Graphing Calculator
- 17:55, 13 May 2016 diff hist -25 Lesson 2.3: Analyzing the Exam
- 17:54, 13 May 2016 diff hist +170 Lesson 3.1: Teaching with the Graphing Calculator
- 17:52, 13 May 2016 diff hist -134 Lesson 3.2: Lesson Planning
- 17:52, 13 May 2016 diff hist +159 Lesson 3.1: Teaching with the Graphing Calculator
- 17:51, 13 May 2016 diff hist +159 Lesson 2.3: Analyzing the Exam
- 17:50, 13 May 2016 diff hist +67 Lesson 2.2: Problem Solving
- 17:48, 13 May 2016 diff hist +818 Lesson 2.1: Graphing Calculator Skills current
- 17:38, 13 May 2016 diff hist -6 Lesson 1.1: Reflection
- 17:37, 13 May 2016 diff hist -6 Lesson 1.2: Goal Setting current
- 17:37, 13 May 2016 diff hist -6 Lesson 2.1: Graphing Calculator Skills
- 17:36, 13 May 2016 diff hist +73 Lesson 2.1: Graphing Calculator Skills
- 17:35, 13 May 2016 diff hist -1 Lesson 1.1: Reflection
- 17:34, 13 May 2016 diff hist +73 Lesson 1.2: Goal Setting
- 17:31, 13 May 2016 diff hist +74 Lesson 1.1: Reflection
- 17:29, 13 May 2016 diff hist +136 Teaching Problem Solving in Algebra using the Graphing Calculator →Resources
- 17:21, 13 May 2016 diff hist +58 Teaching Problem Solving in Algebra using the Graphing Calculator →Resources
- 17:19, 13 May 2016 diff hist +62 Teaching Problem Solving in Algebra using the Graphing Calculator →Resources
- 17:05, 13 May 2016 diff hist +21 Teaching Problem Solving in Algebra using the Graphing Calculator
- 14:25, 13 May 2016 diff hist +1 Lesson 3.2: Lesson Planning
- 14:24, 13 May 2016 diff hist +134 Lesson 3.2: Lesson Planning
- 14:24, 13 May 2016 diff hist -225 Lesson 3.1: Teaching with the Graphing Calculator
- 14:23, 13 May 2016 diff hist +1 Lesson 3.2: Lesson Planning
- 14:12, 13 May 2016 diff hist +1 Lesson 2.3: Analyzing the Exam
- 14:11, 13 May 2016 diff hist +1 Lesson 2.1: Graphing Calculator Skills
- 14:11, 13 May 2016 diff hist +1 Lesson 1.1: Reflection
- 14:11, 13 May 2016 diff hist -1 Lesson 1.1: Reflection
- 14:10, 13 May 2016 diff hist -1 Lesson 1.1: Reflection
- 14:10, 13 May 2016 diff hist +3 Lesson 1.1: Reflection
- 14:09, 13 May 2016 diff hist -2 Lesson 1.1: Reflection
- 14:09, 13 May 2016 diff hist +3 Lesson 1.1: Reflection
- 14:09, 13 May 2016 diff hist +3 Lesson 1.2: Goal Setting
- 14:08, 13 May 2016 diff hist -1 Lesson 1.2: Goal Setting
- 13:50, 13 May 2016 diff hist +2 Lesson 3.2: Lesson Planning
- 13:50, 13 May 2016 diff hist +62 Lesson 3.2: Lesson Planning
- 13:50, 13 May 2016 diff hist +59 Lesson 3.1: Teaching with the Graphing Calculator
- 13:49, 13 May 2016 diff hist +59 Lesson 2.3: Analyzing the Exam
- 13:48, 13 May 2016 diff hist -32 Lesson 2.2: Problem Solving
- 13:48, 13 May 2016 diff hist +40 Lesson 2.2: Problem Solving
- 13:47, 13 May 2016 diff hist +39 Lesson 2.1: Graphing Calculator Skills
- 13:46, 13 May 2016 diff hist +1 Lesson 1.2: Goal Setting
- 13:46, 13 May 2016 diff hist +3 Lesson 1.2: Goal Setting
- 13:45, 13 May 2016 diff hist +2 Lesson 1.2: Goal Setting
- 13:45, 13 May 2016 diff hist +37 Lesson 1.2: Goal Setting
- 13:44, 13 May 2016 diff hist 0 Lesson 1.1: Reflection
- 13:44, 13 May 2016 diff hist +2 Lesson 1.1: Reflection
- 13:43, 13 May 2016 diff hist +5 Lesson 1.1: Reflection
- 13:43, 13 May 2016 diff hist +1 Lesson 1.1: Reflection
- 13:43, 13 May 2016 diff hist +6 Lesson 1.1: Reflection
- 13:42, 13 May 2016 diff hist 0 Lesson 1.1: Reflection
- 13:42, 13 May 2016 diff hist +30 Lesson 1.1: Reflection
- 13:41, 13 May 2016 diff hist 0 N File:Streetsigns.gif current
- 13:35, 13 May 2016 diff hist +162 Lesson 2.3: Analyzing the Exam
- 13:26, 13 May 2016 diff hist -3 Lesson 2.3: Analyzing the Exam
- 13:25, 13 May 2016 diff hist -2 Lesson 2.3: Analyzing the Exam
- 13:25, 13 May 2016 diff hist +28 Lesson 2.3: Analyzing the Exam
- 13:23, 13 May 2016 diff hist 0 N File:240232.jpg current
- 13:14, 13 May 2016 diff hist +1 Lesson 2.3: Analyzing the Exam
- 13:13, 13 May 2016 diff hist +1 Lesson 2.3: Analyzing the Exam
- 13:13, 13 May 2016 diff hist -1 Lesson 2.3: Analyzing the Exam
- 13:08, 13 May 2016 diff hist +3 Lesson 2.3: Analyzing the Exam
- 13:07, 13 May 2016 diff hist +181 Lesson 2.3: Analyzing the Exam
- 13:05, 13 May 2016 diff hist +185 Lesson 3.1: Teaching with the Graphing Calculator
- 12:08, 13 May 2016 diff hist +46 Lesson 3.1: Teaching with the Graphing Calculator
- 12:00, 13 May 2016 diff hist +332 Lesson 2.3: Analyzing the Exam
- 10:43, 13 May 2016 diff hist +163 Lesson 2.3: Analyzing the Exam
- 10:26, 13 May 2016 diff hist +110 Lesson 2.3: Analyzing the Exam
- 13:08, 12 May 2016 diff hist -33 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:08, 12 May 2016 diff hist -1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:08, 12 May 2016 diff hist +4 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:08, 12 May 2016 diff hist +3 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:07, 12 May 2016 diff hist +1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:06, 12 May 2016 diff hist -1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:06, 12 May 2016 diff hist +7 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:06, 12 May 2016 diff hist +1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:06, 12 May 2016 diff hist +1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:05, 12 May 2016 diff hist 0 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:04, 12 May 2016 diff hist 0 File:201748.jpg RTobin uploaded a new version of "File:201748.jpg" current
- 13:03, 12 May 2016 diff hist -5 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:03, 12 May 2016 diff hist +3 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:03, 12 May 2016 diff hist -4 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:03, 12 May 2016 diff hist -6 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:02, 12 May 2016 diff hist +2 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:02, 12 May 2016 diff hist +2 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:02, 12 May 2016 diff hist -6 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:02, 12 May 2016 diff hist +6 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:01, 12 May 2016 diff hist +1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:01, 12 May 2016 diff hist -9 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:01, 12 May 2016 diff hist -1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:01, 12 May 2016 diff hist +1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 12:59, 12 May 2016 diff hist +6 Teaching Problem Solving in Algebra using the Graphing Calculator
- 12:59, 12 May 2016 diff hist +1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 12:58, 12 May 2016 diff hist +25 Teaching Problem Solving in Algebra using the Graphing Calculator
- 12:58, 12 May 2016 diff hist 0 N File:201748.jpg
- 12:57, 12 May 2016 diff hist -32 Teaching Problem Solving in Algebra using the Graphing Calculator
- 12:54, 12 May 2016 diff hist +1 Lesson 2.2: Problem Solving
- 12:54, 12 May 2016 diff hist +111 Lesson 2.2: Problem Solving
- 12:53, 12 May 2016 diff hist +85 Lesson 2.1: Graphing Calculator Skills
- 11:30, 12 May 2016 diff hist +161 Lesson 2.1: Graphing Calculator Skills
- 11:19, 12 May 2016 diff hist +85 Lesson 1.2: Goal Setting
- 11:14, 12 May 2016 diff hist +26 Lesson 1.2: Goal Setting
- 11:12, 12 May 2016 diff hist +198 Lesson 1.1: Reflection
- 11:03, 12 May 2016 diff hist +85 Lesson 1.1: Reflection
- 11:02, 12 May 2016 diff hist +150 Lesson 1.1: Reflection
- 10:58, 12 May 2016 diff hist +26 Lesson 1.1: Reflection
- 13:55, 11 May 2016 diff hist -12 Lesson 3.2: Lesson Planning
- 13:53, 11 May 2016 diff hist +72 Lesson 3.2: Lesson Planning
- 13:53, 11 May 2016 diff hist +93 Lesson 3.1: Teaching with the Graphing Calculator
- 13:47, 11 May 2016 diff hist +90 Lesson 2.3: Analyzing the Exam
- 13:45, 11 May 2016 diff hist +40 Lesson 3.2: Lesson Planning
- 13:45, 11 May 2016 diff hist +39 Lesson 3.1: Teaching with the Graphing Calculator
- 13:35, 11 May 2016 diff hist +2 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:34, 11 May 2016 diff hist +30 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:33, 11 May 2016 diff hist 0 N File:Applearrow.jpg current
- 13:32, 11 May 2016 diff hist +6 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:32, 11 May 2016 diff hist -2 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:31, 11 May 2016 diff hist +6 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:31, 11 May 2016 diff hist -1 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:30, 11 May 2016 diff hist 0 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:30, 11 May 2016 diff hist 0 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:30, 11 May 2016 diff hist -5 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:29, 11 May 2016 diff hist -3 Teaching Problem Solving in Algebra using the Graphing Calculator
- 13:29, 11 May 2016 diff hist 0 N File:Algebra.jpg current
- 13:12, 11 May 2016 diff hist -7 Lesson 3.2: Lesson Planning
- 13:12, 11 May 2016 diff hist +7 Lesson 3.2: Lesson Planning
- 13:12, 11 May 2016 diff hist +6 Lesson 3.2: Lesson Planning
- 13:12, 11 May 2016 diff hist +24 Lesson 3.2: Lesson Planning
- 13:10, 11 May 2016 diff hist 0 N File:Thankyouu.jpg current
- 13:07, 11 May 2016 diff hist -18 Lesson 3.1: Teaching with the Graphing Calculator
- 13:07, 11 May 2016 diff hist +19 Lesson 2.3: Analyzing the Exam
- 13:06, 11 May 2016 diff hist -12 Lesson 1.1: Reflection
- 13:06, 11 May 2016 diff hist +12 Lesson 1.1: Reflection
- 13:05, 11 May 2016 diff hist +6 Lesson 3.2: Lesson Planning
- 13:05, 11 May 2016 diff hist +35 Lesson 3.1: Teaching with the Graphing Calculator
- 13:05, 11 May 2016 diff hist -25 Lesson 3.1: Teaching with the Graphing Calculator
- 13:04, 11 May 2016 diff hist +9 Lesson 3.1: Teaching with the Graphing Calculator
- 13:04, 11 May 2016 diff hist -25 Lesson 3.2: Lesson Planning
- 13:03, 11 May 2016 diff hist +222 N Lesson 3.2: Lesson Planning Created page with "'''Task''' '''Next Lesson''': Lesson 2.3: Analyzing the Exam '''Previous Lesson''': Lesson 2.2: Problem Solving '''Back to Mini Course''': Teaching Problem Sol..."
- 13:03, 11 May 2016 diff hist +210 Lesson 3.1: Teaching with the Graphing Calculator
- 13:02, 11 May 2016 diff hist +10 N Lesson 3.1: Teaching with the Graphing Calculator Created page with "'''Task'''"
- 13:01, 11 May 2016 diff hist +45 Teaching Problem Solving in Algebra using the Graphing Calculator →Unit 3: Lesson Planning and Instruction
- 12:59, 11 May 2016 diff hist -11 Lesson 2.3: Analyzing the Exam
- 12:58, 11 May 2016 diff hist +37 Lesson 2.3: Analyzing the Exam
- 12:48, 11 May 2016 diff hist +2 Lesson 2.2: Problem Solving
- 12:48, 11 May 2016 diff hist +1 Lesson 2.2: Problem Solving
- 11:44, 11 May 2016 diff hist +59 Lesson 2.1: Graphing Calculator Skills
- 11:43, 11 May 2016 diff hist +19 Lesson 2.1: Graphing Calculator Skills
- 11:43, 11 May 2016 diff hist +1 Lesson 1.1: Reflection
- 11:43, 11 May 2016 diff hist +18 Lesson 2.1: Graphing Calculator Skills
- 11:42, 11 May 2016 diff hist 0 Lesson 1.2: Goal Setting
- 11:41, 11 May 2016 diff hist +4 Lesson 1.1: Reflection
- 11:41, 11 May 2016 diff hist +42 Lesson 2.2: Problem Solving
- 11:40, 11 May 2016 diff hist +40 Lesson 2.2: Problem Solving
- 11:40, 11 May 2016 diff hist -9 Lesson 2.2: Problem Solving
- 11:40, 11 May 2016 diff hist -11 Lesson 2.2: Problem Solving
- 11:39, 11 May 2016 diff hist +147 Lesson 2.2: Problem Solving
- 11:37, 11 May 2016 diff hist +94 Lesson 2.2: Problem Solving
- 11:34, 11 May 2016 diff hist -1 Lesson 2.2: Problem Solving
- 11:33, 11 May 2016 diff hist +75 Lesson 2.2: Problem Solving
- 11:31, 11 May 2016 diff hist +333 Lesson 2.2: Problem Solving
- 11:28, 11 May 2016 diff hist +2 Lesson 2.2: Problem Solving
- 11:28, 11 May 2016 diff hist +45 Lesson 2.2: Problem Solving
- 11:26, 11 May 2016 diff hist +1 Lesson 2.2: Problem Solving
- 11:26, 11 May 2016 diff hist +2 Lesson 2.2: Problem Solving
- 11:25, 11 May 2016 diff hist +6 Lesson 2.2: Problem Solving
- 11:25, 11 May 2016 diff hist -103 Lesson 2.2: Problem Solving
- 11:24, 11 May 2016 diff hist +178 Lesson 2.2: Problem Solving
- 11:18, 11 May 2016 diff hist +16 Teaching Problem Solving in Algebra using the Graphing Calculator →Unit 3: Lesson Planning and Instruction
- 11:14, 11 May 2016 diff hist +227 Lesson 2.3: Analyzing the Exam
- 11:13, 11 May 2016 diff hist +42 Lesson 2.2: Problem Solving
- 11:13, 11 May 2016 diff hist +28 Lesson 2.1: Graphing Calculator Skills
- 11:13, 11 May 2016 diff hist +26 Lesson 1.2: Goal Setting
- 11:11, 11 May 2016 diff hist +25 Lesson 2.2: Problem Solving
- 11:11, 11 May 2016 diff hist +25 Lesson 2.1: Graphing Calculator Skills
- 11:10, 11 May 2016 diff hist +25 Lesson 1.2: Goal Setting
- 11:10, 11 May 2016 diff hist +268 Lesson 1.2: Goal Setting
- 10:54, 11 May 2016 diff hist +65 Lesson 2.2: Problem Solving
- 10:53, 11 May 2016 diff hist 0 Lesson 2.2: Problem Solving
- 10:53, 11 May 2016 diff hist 0 Lesson 2.1: Graphing Calculator Skills
- 10:53, 11 May 2016 diff hist +2 Lesson 1.2: Goal Setting
- 10:53, 11 May 2016 diff hist +12 Lesson 1.2: Goal Setting
- 10:52, 11 May 2016 diff hist +2 Lesson 1.2: Goal Setting
- 10:51, 11 May 2016 diff hist +489 Lesson 1.2: Goal Setting
- 10:45, 11 May 2016 diff hist 0 Lesson 1.2: Goal Setting
- 10:44, 11 May 2016 diff hist +139 Lesson 1.2: Goal Setting
- 10:43, 11 May 2016 diff hist +18 Lesson 1.2: Goal Setting
- 10:30, 11 May 2016 diff hist +31 Lesson 1.1: Reflection
- 10:30, 11 May 2016 diff hist -12 Lesson 1.1: Reflection
- 10:29, 11 May 2016 diff hist +4 Lesson 1.1: Reflection
- 10:28, 11 May 2016 diff hist +38 Lesson 1.1: Reflection
- 10:27, 11 May 2016 diff hist +851 Lesson 1.1: Reflection
- 10:15, 11 May 2016 diff hist +17 Lesson 1.1: Reflection
- 10:14, 11 May 2016 diff hist +62 Lesson 1.1: Reflection
- 10:13, 11 May 2016 diff hist +36 Lesson 1.1: Reflection
- 10:12, 11 May 2016 diff hist +22 Lesson 1.1: Reflection
- 15:51, 8 May 2016 diff hist -8 Lesson 2.2: Problem Solving
