mejoró

third-person singular preterite indicative of mejorar

la

• Article

  the

• Pron
• Noun

calidad

1. quality (level of excellence)
2. kind, type

de la

of the

enseñanza

teaching

en

1. in, at, on
2. in (a time)
3. in (a language)
4. used after some verbs and translated by various prepositions in English
5. in (in various expressions)

las

• Article

  the

• Pron
• Noun

escuelas

• Noun

  plural of escuela

• Verb