 # Model Lessons in Math & Science

Using open number lines to add plus 10 to a two digit number - Robin Taylor
1.NBT.5 Given a 2 digit number, mentally find 10 more or 10 less than the number without having to count. Explain the reasoning used.

The first strategy to get to mentally add 10 is using a 100's chart. This is the next strategy using the open number line to add 10 more. Eventually this will lead to mentally being able to do it.

Other strategies found on the video is using learnzillion videos, think alouds, and the gradual release model.

Multiplication Strategies - Dawn Smith
Learn some cool multiplication strategies as you watch this lesson on multiplying with a 6.
3OA1 Interpret products of whole numbers
3OA3 Use multiplication and division within 100 to solve word problems
3OA4 Determine the unknown whole number in a multiplication or division equation
3OA5 Apply properties of operations as strategies to multiply and divide
3OA7 Fluently multiply and divide within 100
3OA8 Solve two step word problems using the four operations
3OA9 Identify arithmetic patterns, and explain them using properties of operations

Math Practices
MP1. Make sense of problems and persevere in solving them
MP2. Reason abstractly and quantitatively
MP3. Construct arguments and critique the reasoning of others
MP4. Model with mathematics
MP7 Look for and make use of structure
MP8 Look for and express regularity in repeated in reasoning