Mathematics. 4th grade. I will learn to solve any problems

Challenge (problem, difficult task, challenge) is a great opportunity to set a goal and go to its implementation. This is the opportunity to clearly plan your actions for a certain period: day, week, month, academic quarter, half a year, etc. This is a kind of competition: who is faster, better.
Tasks in the challeng-wrappers are small: 2-3 tasks for 1 lesson. Each lesson checks and first evaluates the child (emoticons), then an adult: teacher, teacher or parent.
In grade 4, the child will learn to quickly and correctly decide:
- tasks for proportions and interest,
- tasks for the quantity, price and cost,
- tasks for finding length and distance, speed and time, mass and volume,
- tasks for the perimeter and area.
Challengage tests can be used at each lesson for independent work, at home to consolidate the material studied, during the holidays, to quickly repetition of a particular topic of the training course