1. Nombres. Nouns. Nouns in spanish has a gender.
Rules that apply to the gender of nouns in spanish:
Most words that end –a are femenine.
Most words that end –o are masculine.
Ex. Casa (house) ends in –a is femenine
Perro (dog) ends in –o is masculine.
3. Words that end –cion,-sion, -tad, -dad and –umbre are almost always femenine.
Ex. Libertad (liberty), conclusion, television, lumbre (combustible material), universidad, nacion (nation), personalidad (personality), conversacion.
4. Words that end in –a but that come from greek are masculine.
Ex. Problema, sistema, idioma, tema, clima, programa, poema, telegrama.
Nouns in spanish has a gender.
They are either female or male.
There is no way to know the gender of the noun by just it’s meaning.
You must learn the gender of each noun along with the word for the noun.
Ex.
El arbol (the tree) masculine
La flor (the flower) femenine

2. Practica con los nombres.
Árbol
Flor
Pájaro
Silla
Tienda
6. Iguana
Planta
Conejo
Búho
Ballena

3. Nombres:
12. Conejo (rabbit) 13. Bandera (flag) 14. Tiza (chalk) 15. Ventana (window) 16. Pagina (page) 17. Cereza (cherry) 18. Flamenco (flamingo) 19. Teclado (keyboard) 20. Computadora (computer) 21. Pato (duck) 22. Papel (paper) 23. Taza (cup) 24. Bolsa (bag) 25. Cartera (purse)
Arbol (tree)
Computadora (computer)
Libro (book)
Costumbre (custom)
Libreta (notebook)
Calendario (calendar)
Escritorio (desk)
Casillero (locker)
Nacionalidad (nationality)
Planta (planta)
Vaca (cow)