Spectrum系列也算是鸡娃届美名远扬，
看到站里有部分系列的资源，
试着把其他系列补全~
Basic Beginnings：https://www.jiwake.com/post/78400
Critical Thinking for Math：https://www.jiwake.com/post/79763
一共4本：
Spectrum Hands-On Preschool Math Workbook, Dry Erase Counting, Addition, Subtraction, Shapes, and Patterns Preschool Activity Book With Dry Erase Pen and Cut-Out Math Manipulatives
Spectrum Hands-On Kindergarten Math Workbook, Dry Erase Counting, Addition, Subtraction, Place Value, Geometry Kindergarten Math Activities With Dry Erase Pen and Cut-Out Math Manipulatives
Spectrum Hands-On 1st Grade Math Workbooks, Dry Erase Addition, Subtraction, Place Value, Graphs, Geometry Activities With Dry Erase Pen and Cut-Out Math Manipulatives
Spectrum Hands-On 2nd Grade Math Workbooks, Dry Erase Addition, Subtraction, Multiplication, Place Value, Geometry, Telling Time Activities With Dry Erase Pen and Cut-Out Math Manipulatives
