Grammar Helpers
Aligned to L.2.1 — Common Core State Standards for English Language Arts.

What this lesson teaches
Some words follow special rules. A group can have one name, some plurals change, and describing words tell more.
Worked examples
Example 1
One 'team' is many players (collective noun). One 'foot' becomes two 'feet' (irregular plural). 'I did it myself' uses a reflexive word.
Example 2
One 'flock' is many birds. One 'mouse' becomes two 'mice.' 'She fixed it herself' uses a reflexive word.
Example 3
Irregular plurals have to be learned one at a time: child/children, tooth/teeth, goose/geese. Adding an s does not work on these.
Practice questions
- Name a word that means a group, like 'flock' or 'team'.
- Write the plural of 'child' and 'mouse'.
- Use a describing word to tell more about a noun.
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Ayudantes de gramática
Algunas palabras siguen reglas especiales. Un grupo puede tener un nombre, algunos plurales cambian y las palabras que describen dicen más.
Ejemplo 1: Un 'equipo' tiene muchos jugadores (sustantivo colectivo). El plural de 'lápiz' es 'lápices' (cambia). 'Lo hice yo mismo' usa una palabra reflexiva.
Ejemplo 2: Una 'parvada' son muchos pájaros. El plural de 'luz' es 'luces' (cambia la z). 'Ella lo arregló ella misma' usa una palabra reflexiva.
Ejemplo 3: Los plurales que cambian se aprenden uno por uno: pez/peces, lápiz/lápices, rey/reyes. Agregar solo una s no funciona con estos.
More Language lessons
Teach this lesson today
An AI tutor that guides with questions instead of just giving answers — all K–12 core subjects, every child in the family.
Start free — no card required