Lesson Plan: Numbers up to 20 for 1st Year Elementary School

Written by Mariana Santos

ArqBahia team of authors.


  1. Provide students with a clear and comprehensive understanding of numbers up to 20.
  2. Develop counting, identification and representation skills for numbers up to 20.
  3. Encourage the resolution of simple problems involving numbers up to 20.


  • Start the class by remembering the numbers up to 10, through counting and identification activities.
  • Present the numbers 11 to 20 gradually, highlighting their differences in relation to the previous numbers.
  • Use concrete materials, such as building blocks or numerical cards, to represent and manipulate numbers up to 20.


  1. Review of numbers up to 10: <10 minutos>
    • Carry out counting activities together with students, highlighting the numerical sequence up to 10.
  2. Presentation of numbers 11 to 20: <15 minutos>
    • Enter the numbers 11 to 20, showing their sequence and differences in relation to the previous numbers.
  3. Practical identification and representation activities: <25 minutos>
    • Distribute number cards and ask students to identify and represent numbers up to 20.
    • Propose association activities between numerals and quantities of objects, such as counting and grouping caps or pencils.


  1. Learning Check: <10 minutos>
    • Carry out a round of questions and answers to check if students can identify the numbers up to 20.
  2. Student feedback: <5 minutos>
    • Ask students to express what they liked most or had difficulty with during the class.


  • Propose fixation exercises involving counting and identifying numbers up to 20.


  • Review the main concepts covered in class, emphasizing the importance of understanding numbers up to 20 for mathematical development.
  • Reinforce the idea of practice and constant review to strengthen learning of numbers up to 20.
  • Encourage students to explore and practice more at home in order to consolidate the knowledge acquired.
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